2018-04-30  Richard Biener  <rguenther@suse.de>

	PR bootstrap/85571
	* Makefile.tpl (STAGE3_CFLAGS): Use -fchecking=1.
	(STAGE3_TFLAGS): Likewise.
	(STAGEtrain_CFLAGS): Filter out -fchecking=1.
	(STAGEtrain_TFLAGS): Likewise.
	* Makefile.in: Regenerate.

	* dwarf2out.c (gen_producer_string): Ignore -fchecking[=].

From-SVN: r259755